Purchase Solution

Simple Statistics: Probability for Standard Normal Random Variable

Not what you're looking for?

Ask Custom Question

6.3. Find the following probabilities for the standard normal random variable z: {see attachment}

6.7. Find a Zo that has area .9505 to its left.
Find a Zo that has area .05 to its left.

Attachments
Purchase this Solution
Solution Summary

This solution is provided in approximately 129 words. It contains mainly equations for finding probabilities and Z scores.

Solution Preview

6.3 Find the following probabilities for the standard normal random variable z:

a) P (-1.43 <Z<.68) = P (Z<.68)-P(Z<-1.43)
Since P(Z<-1.43) = P(Z>1.43)=1- P(Z<1.43)
Then P (-1.43 ...

Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • probability

    By central limit theorem if n is big enough (>=25), the binomial random variable is approximate normal random variable, with the same mean and standard deviation.

  • Descriptive Statistics and Probability Distribution

    (c) Compute and interpret the mean of the random variable X. (d) Compute the standard deviation of the random variable X.

  • Statistics MCQ - Multiple Choice

    If a random variable z is the standard normal score, then the standard deviation of the distribution is 1. ____ T/F 6. Every binomial distribution may be approximated reasonably by an appropriate normal distribution ___ T/F 7.

  • MCQs & True or False Questions: Probability

    331869 20 Statistics questions: random variable, binomial distribution, Poisson, std deviation 1. A random variable is assigned numerical values based on the outcomes of an experiment - TRUE OR FALSE 2.

  • Continuous probability distribution

    Let the random variable T represent the life times of these bulbs. A bulb picked up at random from the lot may last for 1205 hours or it may last for 1205.50 hours also.

  • Probability Distribution: Binomial & Normal

    Determine the probability distribution of the random variable x. (Hint: complete the table by finding relative frequencies.) (b). Construct a probability histogram for the random variable x. (c).

  • Practice Quiz - Statistics

    560648 Practice Quiz - Statistics 1. The cumulative probability distribution of a random variable X gives the probability that X is _______ to x_0, some specified value of X. a. Greater than or equal c. Less than or equal b.

  • the differences between the binomial and normal distribution

    The standard normal distribution is the normal distribution with a mean of zero and a standard deviation of one (the green curves in the plots to the right).

  • Assembly Line Stats

    The amount of time necessary for assembly line workers to complete a product is a normal random variable with a mean of 15 minutes and a standard deviation of 2 minutes.

View More Related Solutions